Scale.



R, MCPARLANE.

, SCALE. y I APPLICATION FILED JAN.2B,1911, HENEWBD 0GT.3,1912. v 1,072,390, Patented sept. 2,1913.

2 SHEBTSj-SHEET 1.

J70/PME YS R. MOFARLANB.

SCALE.

APPLICATION FILED .TAN.28, 1911. RENEWBD 00T. 3, 1912,

.1,O"7"2,39O Patented Sept. 2, 1913,

2 SHEETS-SHEET 2.

'gal/0,1 10aa,

"Logra-,39a

UNITED sTairEs .ra-TENT oEEicE.

BOBEMUMGFARLANE, or MINNE'Ar'oLrs, MINNESorA, AsstcNon 'ro MciAn'LANE MEN- UFACTURING COMPANY, F CHICAS@ ILLINOIS, A *IlQImATION 0F ILLINOIS.

'sciita ispec'il'ic'ati'on of Letters Patent. Patented Sept. 2, 1913.

Application led January 28, 1'911, Serial No. 605,3214.. Renewed (lctebcr 3, 1912. Serial No. 723,815.

vTo all whom it may concern.'

Be it known that I, Roen'r McFARnANn, of Minneapolis, Hennepin county, Minnesota,ih-ave invented ccertain new and useful Improvements in Scales, of ,which the following is a specification.

T he object of my invention is to improve.'

The invention consists generally in means whereby the 'operator of a truck load ofl merchandise can at a glance determinethe weight of the load onthe truckwithout the necessity of making a mental or mechanical deduction of the 'weight of the vtruck from the total wi'aight of the load on'jthe scale platform;

'Further the invention consists in means' 'for locking the beam to allow the load to be removed'-from' the platform without affectingthe position ofthe beam orl pointer.

urther the invention consists in an indieating device by/whicl'iv theA operatorcan readily" determine whether the vbeam is xiii 'inafter described and 'out in the claims.

its locked 'or unlocked condition.

Frther the invention consists lin various constructions and combinations, 'all as hercpai-ticularly pointed .In the accompanying drawings forming part of this specification, Figure 1 is a front view ofthe upper portion of al platform scale with my invention applied thereto, Fig. 2 is a det^il sectional view showing the arrangement of the auxiliary or supplementary -beam and its connections, Fig. 3 is a sectional view showing the mechanism between, the beam and the indicator hand,

Fig. 4 is a transverse sectional lView illusyielding leased, Figs. 8 and 9 are detail views of the indicator hands. Y y

In the drawin 2 represents the upper portion of a plat crm Scale ofv any ordinary or'preferred' construction, having standards B Iand 4 thereon,v the latter supporting the scale beam 5, graduatedin the usual Way and provided with the usual poise weight 6.-

7 is a connecting rod extending to the platformlevers', as usual in scales of this ind, the levers and platform being omitted from the drawing, as they forni no part of my present invention. This rod, instead of being connected directly to the short arm of the beam das-usual, h-as a pivotal connection 8 with the short arm of an auxiliary beam or lever 9pivoted at 10 on a hanger or lever 11' that is connected' with the short arm of the beam 5 by a link 12. This hanger preferably extends under the main scale beam substantially parallel therewith and supports a suitable casing 13 finto which the lever or beam 9 projects and oscillates vertically; the hanger and casing being normally stationary.- The end of thecasiiig opposite from its point of connect-ion withl the main beam is provided witha support- `king" means preferably a tubular member 14 adapted to receive a standard Y15 thatl is mountedon the part 2, thetop of said standard having a head orA cap which is provided with a concave upper surface to receive a bearing ball 17 whichjts a similar surface provided in the upper end of-the tube 14. This b'a'll and stan ard support the casing in a normal, horizontal position and allow a slight oscillation thereof to accommodate the lever 9 and prevent cramping or binding of the pivots of said lever and the connections with the platform levers and the main beam of the scale. So far the apparatus described corresponds substantially to what is shown in my applications above referred to. y

A dash-'pot device 18 is provided in the casing 13 and pivotally connected with the lever 9 to regulate its movement and in place' of the spring usually employed to at'ord'a yielding resistance to the movement of the lever 9, I prefer to provide 'a weight device 19 having a curved under surface that is ,adapted to rock on the knife edge bearings 20 provided in the bottom of the casing 13. This weight is pivotally connected by'a link 21 with the lever 9. The weight is so proportioned that as the lever or beam 9 swings upwardly and the Weight. is. tilted on its bearings, the load on the link g14 will increase as the weight is tilted correspondingly 110 to the increasing resistance ofa spring as it is put under tension. Asector shaped member is preferably pivoted at 23 on the casing and is provided with a curved rack bar 24 5 which meshes with a pinion 25 on a stud 26 which carries agear wheel 27. This 'wheel meshes with a pinion 28 on a studv 29. The studs 26 and 29 project through the fac-e of a Graduated dial 30 and indicator hands 31 and 32 are mounted on the stud 29 and are adapted to move over the graduations on the dial, indicating the welght in pounds preferably up to 1000'po'unds, graduated intens from -zero to one thousand. A secondary dial or series of raduations is provided, indicating thousan s,rand a hand- 33 is mounted on the postA 26 and indicates the weight on the Platform in thousands of pounds. ,A link 34 'connects the beam with the sector 22 so that upward-movement of the beam 4or lever will be ommunicated through -the' link and sector to the indicatorI hands. lThe hand 31 is normally setfat zero and the hand 32 a distance reading backwardv from zero suiiicientjo indicate theweight of the empty truck,'in this case 120 pounds. If then a loaded truck is moved on to the scale platform the hand 32 will move forward past the zero point until the scale balances when it will point to the true weight of the load, less the truck. For-iin' stance, if there were 150'pounds o f merchandise on the truck, the hand'32 would move half-way 'between the'lOO and 200 pound .35 graduations' at l`the right of the zero mark and' the' clerltj` or o Ieratorv without any mental subtraction oft e weight of the truck andwithoutthepuse of a pencil can deter-Y mine at a glance the weight of the merchan- 40 dise. Ifthe truck Ais`heavier or lighter than for what the hand; 32 is set, the hand may be moved backward' `or forward on -the dial until it points to' the proper graduation. .If

there is a load on the platform without any truck, the indica-tor hand 31 will be used to determine the weight.

I prefer 1n""this apparatus .to provide means toailow theiindicator hand 31 to revolve three times over its graduatlons and 1n y 5o so doing the indicator hand 33 will be moved has been ascertained, so that the load may' be removed from the platformand `a correct reading of the dial obtained thereafter. With this end' in view I provide jaws 34 pivoted preferabl at 35 at one endof the casing andstra'd ling the leveror beam 9. These jaws are normally-'held apart by a 70 spring 36. A rock shaft'37 is mounted .in the casing and provided with an operatin' handle 38 and a block 39 is mounted on sai shaft and projects between .the lower ends of the jaws 34 and has cam surfaces 40 75 which engage said jaws and force their lower ends apart,causing their upper portions to grip the lever 9 and holdit securely inthe position it-may have assumed when the load was placed on the platform; When this has so been done, the load may be removed, thel lever 9 will remain stationary and the indicator hands will" point to the weightof the load on the dial and ,allow a notation to be made of such weight, even though the scale platform is free of its load. I- also prefer to' provide means. for indicating whether the lever- 9 is in its locked or released position andfor this purpose I mount a cam 41omtheyshaft I3'( in position to en- 90 gage one arm ofta bell crank'42 that is piv-v oted on the- 'wallofthe casin and is connected by a link 423 with' an 'indicating late' 44 that isA also pivoted at one end o -the casing and ha aface bearing the wordsl Open and i ocked', that is adapted to moves back and'forth in the rearof a slot 45 in, the dial. The locking of the lever 9' will swin this plate until the word Locken 1SA visible through the slot 45,@1 150 e upon releasing the lever -9 the late 44'will drop and expose the word pen. Ihe scale operator willl thus understand that the lever 9 has been released Vand that the scale isready to receive another load.

105 The manner'of supporting the rocking weight 'may' be modified in Trione ways,...

and the details ,ofthe mech nismshown herein maybe chaiiged'-1witl1o1t depart-ing from'the scope of my intent-ion. 1

j In Figs. 8 and 9 I havjzshown a preferred manner of mounting 'Vthejindicator hands 31 andA 32, which consists intapping the end of the stud 29't0 receive a screw 29' that 'i's' locked in the stud by a pin 29". The head 1115v I i of the screw is provided with holes .to receive the hands 31 and 32, which-hie preferablyformed of wire or smilaf'f-r'ii`l `te'ial that i's capable ofbeing bent to separate Vthe hands or draw them together, the'hads, 120 when bent, remaining` in that positionv untilanother adjustment is desired.- 'One hand may thus be set lat zero and the other hand at a point bach of'the zero mark vto campen? sate for the weight ofthe truck, any variation in the weights of thetrucks being ac-A counted for 'by further bendingr of one of the hands. Thewire hands or indicators preferablvextend beyond the-head of the supporting screw with theirendsheld 1u par- 130 allel relation substantially with one another by a disk or button 30. This manner of mounting the indicator hands insures a rigid support for them which will not be affected by the jarring of the scale incidental to the placing of goods on the plat` form or removing them, and at the Same time a quick and convenient adjustment of the indicator hands is obtained.

Claims.

l. In a platform scale, .the combination, of a oise controlled weighing beam, a beam rod a apted for connection to the scale levers, a lever actuated scale interposed in said beam rod and having means for yieldingly resisting movement of its lever and means for locking said last named lever to prevent it from returning t0 its no-rmal po- -sition when the load is removed from said scale levers.

2. In a platform scale, the combination, of a poise controlled weighing beam, a beam rod, levers interposed in said beam rod, means yieldingly resisting relative movement of said levers, a pointer'actuated by said levers for indicating the load on the scale, and means for locking one of said interposed levers to prevent it4 and said pointer from returning to their normal position when the load is removed from said platform.

3. In a platform scale, the combination, of a poise controlled weighing beam, a beam rod, levers interposed in said rod, means yieldingly resisting relative movement of said levers, a pointer actuated by said levers for indicating the load on the scale, and clamping jaws arranged to engage and lock one of said interposed levers.

4. In a platform scale, the combinatiom,

of a. poise controlled weighing beam, a beam rod, levers interposed in said rod, means yieldingly resistingl relative movement of said levers, a pointer actuated by said levers for indicating' the load on the scale, jaws arranged to straddle one of said levers, and means actuating said jaws to grip said lever.

5. A 'scale comprising a pivoted lever, a second lever pivotally supported on said first named lever and having means for connection with a load support, means yieldingly resisting relat-ive movement of said le vers, a weight indicator carried by the long arm of one lever and operatively connected with the corresponding arm of the other lever, and clamping jaws between which one of said levers is normally movable.

6. A weighing Scale comprising a pivotally supported lever, a beam or second lever pivotally supported on said iirstnamed lever and having means for connection with a platform or load sup'port, means yieldingly resisting relative movement of said levers, a dial and indicator hand carried by one of said levers, means operatively connecting said indicating hand with the other lever.

and means for locking one of said levers to prevent the indicator hand from returning to zero on the dialwhen the load is removed from the scale platform.

7. A scale comprising a pivoted lever, a second lever pivotally supported on said first named lever, the short arm of said second lever having means for connection with a load support,'a weight interposed between the long arms of said levers and resisting relative movement thereof, a weight indicator carried bythe long arm of one lever and operatively connected with the corresponding arm of the other lever, and means for locking one of said levers to prevent said weight indicator from returning to its normalor zero position when the load is removed from its support.

8. A scale comprising a pivoted lever, a second lever pivotally supported on said lirst named lever, the short arm of said sec'- ond lever having means for connection with a load support, means yieldingly resisting relative movement of said levers, a weight indicator carried by the long arm of one lever and operatively connected with the corresponding arm of the other lever, clamping jaws between which one of said levers is normally movable, and a cam device for moving said jaws to their clamping or locking position.

9. A scale comprising a weighing beam, a

hanger or lever suspended thereon, a casing carried by said lever, a dial mounted on said casing, an indicator hand, an auxiliary beam or lever pivoted on said hanger and having alimited swinging movement in said casing; means yieldinglyf resisting relative movement of said levers.v means operatively connecting said auxiliarv beam or lever with said indicator hand, a platform connection attached to said auxiliary beam, and clamping jaws mounted in said casing and between which said beam is normallv movable.

l0. In a Sr de. a pois( controlled weighing beam, a rod [or connection with a load support, a weighing mechanism,interposed between said rod and said beam, said weighing mechanism including a graduated scale and pointer operating to indicate the weight of the load on said support independently of said beam, the subsequent balancing of said beam checking or verifying the weight indicated by said mechanism, and clamping jaws arranged to lock said weighing n1echanism to prevent said pointer from returning to its normal position when the load is removed from its support.

11. In a platform scale, the combinatioln,

of a poise controlled weighing beam, a beam rod, levcrsinterposed in said rod, means yieldingly resisting relative movement of said levers, a pointer actuated by said levers tor indicating. the load in the scale, means for locking one of vsaid levers toprevent it dial and indicator hand carried by one of said levers, means operatively connecting said indicating), hand with the other lever, means vfor locking one of said levers and said indicator hand in the position to which it is moved when a load is placed on the platform, and a'. visual signal actuated by the movement of said locking device to indi- 1cate the locked or unlocked condition of said ever.

ally supported lever,'a beam or second lever pivotally supported on said rst named lever and havingmeans for connection with a platform or load support, means yieldingly resisting relative movement of said levers, a dial and indicatorhand carried by one of said levers,'means operatively connecting said indicator hand with the other lever, a locking means for one of said levers, a plate forming a visual signal connected with said locking means, said plate bearing the Words Open and Locked and indieating to the operator the condition of said lever.

14. A scale comprising a weighing beam, a hanger or leversuspended thereon, a casing'earried by said hanger, a dial mounted on said casing, and provided vvitli an open- 13. A weighing scale comprising a pivoting therein, an indicator hand, an auxiliary beam or lever ivoted on said hangerand having a limite swinging movement in said i attached to said auxiliary beam, a locking` device for said auxiliary beam, a plate pivoted in said casing and adapted to swing past .said dial opening, said plate being marked to indicate the locked or released condition of said auxiliary beam, and means operatively connecting said plate with said locking device. u

15. In ,a scale, a poise controlled weighing beam, a rod for connection with a loadsupport, a weighing mechanism interposed be- -tween said rod and beam, and including relatively movable pivoted levers, a graduated seale and ointer operating to indicate the weight of tiie load on said support, and a weight carried by one of-said levers and pivotally connected with the other lever.

16. In a scale, a poise controlled Weighing beam, a rod for connection with a load sup-4 port, a weighlng mechanism interposed be` tween said rod and beam, and including relatively movable pivoted leversa graduated scale and pointer operating to indicate the weight of the load on said support, and a rocking weight carried by-one of said levers and 'pivotally connected with the other lever. In witness whereof, I have hereunto lset my hand this 27th day of December, 1910.

ROBERT MQFARLANE.

CIT 

